Sunday's fight, which broke out at 9:45 a.m., appears to have included two sides -- about 300 white and Mexican-American inmates against about 100 African-American inmates. That unit holds 1,242 inmates total.

Eighty of the inmates involved in yesterday's fight have since been moved to other institutions, according to ADC, and two of the inmates were still hospitalized as of today. Two prison employees received minor injuries, according to ADC.

September's fight also appeared to be race-related, as ADC said the 200 inmates in that fight were all Hispanic or African-American. Eleven inmates were hospitalized after that fight.

In October, convicted murderer Jimmy Odom tried to escape from the Cimarron unit at the same prison complex.

Odom beat up a contracted worker who drove a delivery truck into the prison, stole the truck, and planned to drive to freedom by running down several layers of fencing, ADC said at the time.

Odom failed at the fence -- he got through the first layer, but just ran the truck right into the outer fence, and got stuck there, according to ADC.